TMA 1TMA has been designed to facilitate identification of markers differentially expressed in primary mesothelioma lesions as well as metastatic lesions. Samples from 40 patients have been incorporated: 36 patients have tissue cores from the primary lesion only, 3 patients have tissue cores from a metastatic lesion only, and 1 patient has tissue cores from both the primary and metastatic lesions. Of the patients with available clinical annotation, 97% are male and 3% are female, and racial breakdown is as follows: 57% white, 3% black, and 39% unknown. Pathologic site and histologic type for annotated cases is shown.